What FA pitcher should I pick up?

Vogelsong and Collmenter are your best bets. Humber has had a few good games under his belt but I think the last one was against Seattle. Who doesnt pitch well against them. Vogelsong is looking good and is ranked 64 overall in Yahoo leagues. Collmenter is ranked 44 but has a fewer amount of innings pitched right now. Collmenter's fastball is in question also but he is still doing very well.